area and volume tab in ArcMap

Hello! During my latest update of ArcMap, a tab on the top that i really need seems to have disappeared. It was added for convenience, and said "Area and Volume". When i clicked on it, it would bring up a box that you would have to hit calculate. It would then calculate the 2d area, the surface area, and the volume of my layer.

Some people have pointed me to the 3D Analyst > Functional surface tools, but this does not bring up that box that i need. The box that it is giving me is different from what i have used before and it is only calculating volume. I very specifically need to calculate the 2d area and the surface area.

It may be that someone designed a custom tool and placed it on your toolbar. Another possibility is that it was a third-party tool (like XTools).

To help narrow it down, would you by any chance have a screenshot of what the display looked like when the tool was open? Also, any chance there is another computer that you could access that has the same functionality?

Once you have narrowed down as to what the tool it is to be used, here's some information on how to rebuild the toolbar: